锚杆支护顺层岩体边坡地震动破坏分析  

Earthquake Damage Analysis of Bolt Supporting Bedding Rock Mass Slope

作　　者：张功会 言志信 ZHANG Gong-hui;YAN Zhi-xin(School of Civil Engineering and Architecture, Anhui University of Science and Technology,Huainan 232001,China;School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467036,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]河南城建学院土木与交通工程学院,河南平顶山467036

出　　处：《煤炭技术》2019年第3期16-19,共4页Coal Technology

基　　金：国家自然科学基金面上资助项目(41372307;51478065)

摘　　要：运用FLAC3D探讨了地震作用下顺倾层状岩体边坡软弱夹层参数(数量S、间距D、厚度H和倾角α)对边坡稳定性与锚杆轴力的影响。研究表明:地震作用下顺倾层状岩体边坡仅沿某一软弱夹层以倾倒-滑移的破坏模式失稳破坏,软弱夹层参数的改变并不会改变其破坏模式和主要破坏面位置;S、H越大,地震作用下坡面永久位移和锚杆轴力越大,D、α越大,永久位移和锚杆轴力越小;轴力沿杆身呈"山峰"式分布,主软弱夹层处"峰值"最高;研究可为地震作用下多层软弱夹层边坡的支护和抗震设计提供有益参考。The influence of the soft intercalation parameters(number S, spacing D, thickness H and inclination angle α) of the sloped layered rock mass on the stability of the slope and the axial force of the anchor is discussed by using FLAC3D. The research shows: Under the action of earthquake, the slope of the sloping layered rock mass only destabilizes under the failure mode of dumping-slip along a weak interlayer and changes in the parameters of the weak interlayer do not change the failure mode and the main failure surface position. The greater the S and H, the greater the permanent displacement and axial force of the slope under the action of earthquake, the larger the D and α, the smaller the permanent displacement and axial force. The axial force is distributed along the shaft in a "mountain peak" type, and the "peak" is the highest at the main weak interlayer. The research can provide a useful reference for the support and seismic design of multi-layer weak interlayer slope under earthquake action.

关 键 词：顺倾层状岩体边坡 软弱夹层参数 稳定性 锚杆轴力 

分 类 号：TD325[矿业工程—矿井建设] TU435[建筑科学—岩土工程]